* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #0a0e27;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #fff;
    min-height: 100vh;
}

/* Header */
header {
    backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.5);
}

nav {
    padding: 1em 3em;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav h1 {
    font-size: 1.8em;
    color: white;
    font-weight: 700;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

nav a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover {
    color: white;
}

/* Tooltip pour contact */
.contact-link {
    position: relative;
}

.contact-link::after {
    content: attr(data-info);
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%) translateY(5px);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 8px 15px;
    border-radius: 6px;
    font-size: 0.85em;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
}

.contact-link:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Links section */
.link {
    text-align: center;
    padding-bottom: 1em;
}

.link ul {
    list-style: none;
    display: inline-flex;
    gap: 15px;
    background: rgba(255, 255, 255, 0.03);
    padding: 10px 20px;
    border-radius: 50px;
}

.link a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    padding: 8px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.link a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

/* Bouton principal */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background: white;
    color: #000;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.9);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 30px;
}

.container h1 {
    padding-bottom: 1em;
}

h1 {
    font-size: 2.5em;
    font-weight: 700;
    color: white;
    text-align: center;
}

h2 {
    font-size: 1.8em;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

/* Footer */
footer {
    text-align: center;
    padding: 2em;
    background: rgba(0, 0, 0, 0.3);
    color: rgba(255, 255, 255, 0.5);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Responsive */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 15px;
        padding: 1em;
    }

    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    h1 {
        font-size: 2em;
    }

    .container {
        padding: 40px 20px;
    }
}